If a video service works like its Music Freedom program does, T-Mobile would just not count content from certain sources against customer data limits. There's no entry in the FCC rulebooks to prohibit that. (Videos via Spotify, Google)

But this is a process called "zero rating." Net neutrality proponents — and the FCC — say an ISP should not grant specific content preferential treatment.

It only benefits those businesses that can get onto T-Mobile's lists. The little guys find it harder to compete. (Video via Netflix)

It's not clear what an arrangement between T-Mobile and its partners might look like, or who would pay for what. (Video via HBO)

But we can assume any services that don't meet T-Mobile's metric for partnership — whether that be entry fees, or market share requirements or whatever — wouldn't get to play. (Video via T-Mobile)

The idea is less concerning if T-Mobile plans to eventually make all data on its network free. But it's not clear if that's technically or economically feasible for the carrier.